Native filesystem access for react-native
- React-Native 0.40 is minimum required for compiling on iOS (otherwise install an older release, see below)
- Access to iOS-based "assets-library" is now supported with
copyAssetsFileIOS readDirwill return now creation- and modification-time of files as withstat()(thanks @Ignigena)- optional connectionTimeout and readTimeout-Settings on
downloadFilefor Android (thanks @drunksaint)
- Removed attributes from
writeFileandappendFilefor iOS / Android consistency downloadFiletakesoptionsobject rather than parametersstopDownloadwill cause the rejection of promise returned bydownloadFileuploadFilespromise resultresponseproperty is nowbody- A boolean is no longer returned from any method except
exists downloadFileanduploadFilesreturn an object of the form{ jobId: number, promise: Promise }mkdirtakes optional 2nd parameteroptionsfor iOS users to set theNSURLIsExcludedFromBackupKeyattribute
First you need to install react-native-fs:
npm install react-native-fs --save
Note: If your react-native version is < 0.40 install with this tag instead:
npm install react-native-fs@2.0.1-rc.2 --save
As @a-koka pointed out, you should then update your package.json to
"react-native-fs": "2.0.1-rc.2" (without the tilde)
At the command line, in your project folder, type:
react-native link react-native-fs
Done! No need to worry about manually adding the library to your project.
Add the RNFS pod to your list of application pods in your Podfile, using the path from the Podfile to the installed module:
pod 'RNFS', :path => '../node_modules/react-native-fs'
Install pods as usual:
pod install
In XCode, in the project navigator, right click Libraries âžś Add Files to [your project's name] Go to node_modules âžś react-native-fs and add the .xcodeproj file
In XCode, in the project navigator, select your project. Add the lib*.a from the RNFS project to your project's Build Phases âžś Link Binary With Libraries. Click the .xcodeproj file you added before in the project navigator and go the Build Settings tab. Make sure 'All' is toggled on (instead of 'Basic'). Look for Header Search Paths and make sure it contains both $(SRCROOT)/../react-native/React and $(SRCROOT)/../../React - mark both as recursive.
Run your project (Cmd+R)
Android support is currently limited to only the DocumentDirectory. This maps to the app's files directory.
Make alterations to the following files:
android/settings.gradle
...
include ':react-native-fs'
project(':react-native-fs').projectDir = new File(settingsDir, '../node_modules/react-native-fs/android')android/app/build.gradle
...
dependencies {
...
compile project(':react-native-fs')
}-
register module (in MainActivity.java)
- For react-native below 0.19.0 (use
cat ./node_modules/react-native/package.json | grep version)
- For react-native below 0.19.0 (use
import com.rnfs.RNFSPackage; // <--- import
public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {
......
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mReactRootView = new ReactRootView(this);
mReactInstanceManager = ReactInstanceManager.builder()
.setApplication(getApplication())
.setBundleAssetName("index.android.bundle")
.setJSMainModuleName("index.android")
.addPackage(new MainReactPackage())
.addPackage(new RNFSPackage()) // <------- add package
.setUseDeveloperSupport(BuildConfig.DEBUG)
.setInitialLifecycleState(LifecycleState.RESUMED)
.build();
mReactRootView.startReactApplication(mReactInstanceManager, "ExampleRN", null);
setContentView(mReactRootView);
}
......
}- For react-native 0.19.0 and higher
import com.rnfs.RNFSPackage; // <------- add package
public class MainActivity extends ReactActivity {
// ...
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(), // <---- add comma
new RNFSPackage() // <---------- add package
);
}- For react-native 0.29.0 and higher ( in MainApplication.java )
import com.rnfs.RNFSPackage; // <------- add package
public class MainApplication extends Application implements ReactApplication {
// ...
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(), // <---- add comma
new RNFSPackage() // <---------- add package
);
}// require the module
var RNFS = require('react-native-fs');
// get a list of files and directories in the main bundle
RNFS.readDir(RNFS.MainBundlePath) // On Android, use "RNFS.DocumentDirectoryPath" (MainBundlePath is not defined)
.then((result) => {
console.log('GOT RESULT', result);
// stat the first file
return Promise.all([RNFS.stat(result[0].path), result[0].path]);
})
.then((statResult) => {
if (statResult[0].isFile()) {
// if we have a file, read it
return RNFS.readFile(statResult[1], 'utf8');
}
return 'no file';
})
.then((contents) => {
// log the file contents
console.log(contents);
})
.catch((err) => {
console.log(err.message, err.code);
});// require the module
var RNFS = require('react-native-fs');
// create a path you want to write to
var path = RNFS.DocumentDirectoryPath + '/test.txt';
// write the file
RNFS.writeFile(path, 'Lorem ipsum dolor sit amet', 'utf8')
.then((success) => {
console.log('FILE WRITTEN!');
})
.catch((err) => {
console.log(err.message);
});// create a path you want to delete
var path = RNFS.DocumentDirectoryPath + '/test.txt';
return RNFS.unlink(path)
.then(() => {
console.log('FILE DELETED');
})
// `unlink` will throw an error, if the item to unlink does not exist
.catch((err) => {
console.log(err.message);
});// require the module
var RNFS = require('react-native-fs');
var uploadUrl = 'http://requestb.in/XXXXXXX'; // For testing purposes, go to http://requestb.in/ and create your own link
// create an array of objects of the files you want to upload
var files = [
{
name: 'test1',
filename: 'test1.w4a',
filepath: RNFS.DocumentDirectoryPath + '/test1.w4a',
filetype: 'audio/x-m4a'
}, {
name: 'test2',
filename: 'test2.w4a',
filepath: RNFS.DocumentDirectoryPath + '/test2.w4a',
filetype: 'audio/x-m4a'
}
];
var uploadBegin = (response) => {
var jobId = response.jobId;
console.log('UPLOAD HAS BEGUN! JobId: ' + jobId);
};
var uploadProgress = (response) => {
var percentage = Math.floor((response.totalBytesSent/response.totalBytesExpectedToSend) * 100);
console.log('UPLOAD IS ' + percentage + '% DONE!');
};
// upload files
RNFS.uploadFiles({
toUrl: uploadUrl,
files: files,
method: 'POST',
headers: {
'Accept': 'application/json',
},
fields: {
'hello': 'world',
},
begin: uploadBegin,
progress: uploadProgress
}).promise.then((response) => {
if (response.statusCode == 200) {
console.log('FILES UPLOADED!'); // response.statusCode, response.headers, response.body
} else {
console.log('SERVER ERROR');
}
})
.catch((err) => {
if(err.description === "cancelled") {
// cancelled by user
}
console.log(err);
});The following constants are available on the RNFS export:
MainBundlePath(String) The absolute path to the main bundle directoryCachesDirectoryPath(String) The absolute path to the caches directoryDocumentDirectoryPath(String) The absolute path to the document directoryTemporaryDirectoryPath(String) The absolute path to the temporary directory (iOS only)LibraryDirectoryPath(String) The absolute path to the NSLibraryDirectory (iOS only)ExternalDirectoryPath(String) The absolute path to the external files, shared directory (android only)ExternalStorageDirectoryPath(String) The absolute path to the external storage, shared directory (android only)
Reads the contents of path. This must be an absolute path. Use the above path constants to form a usable file path.
The returned promise resolves with an array of objects with the following properties:
type ReadDirItem = {
ctime: date; // The creation date of the file (iOS only)
mtime: date; // The last modified date of the file
name: string; // The name of the item
path: string; // The absolute path to the item
size: string; // Size in bytes
isFile: () => boolean; // Is the file just a file?
isDirectory: () => boolean; // Is the file a directory?
};
Reads the contents of dirpath in the Android app's assets folder.
dirpath is the relative path to the file from the root of the assets folder.
The returned promise resolves with an array of objects with the following properties:
type ReadDirItem = {
name: string; // The name of the item
path: string; // The absolute path to the item
size: string; // Size in bytes.
// Note that the size of files compressed during the creation of the APK (such as JSON files) cannot be determined.
// `size` will be set to -1 in this case.
isFile: () => boolean; // Is the file just a file?
isDirectory: () => boolean; // Is the file a directory?
};
Note: Android only.
Node.js style version of readDir that returns only the names. Note the lowercase d.
Stats an item at path.
The promise resolves with an object with the following properties:
type StatResult = {
ctime: date; // The creation date of the file
mtime: date; // The last modified date of the file
size: string; // Size in bytes
mode: number; // UNIX file mode
isFile: () => boolean; // Is the file just a file?
isDirectory: () => boolean; // Is the file a directory?
};
Reads the file at path and return contents. encoding can be one of utf8 (default), ascii, base64. Use base64 for reading binary files.
Note: you will take quite a performance hit if you are reading big files
Reads length bytes from the given position of the file at path and returns contents. encoding can be one of utf8 (default), ascii, base64. Use base64 for reading binary files.
Note: reading big files piece by piece using this method may be useful in terms of performance.
Reads the file at path in the Android app's assets folder and return contents. encoding can be one of utf8 (default), ascii, base64. Use base64 for reading binary files.
filepath is the relative path to the file from the root of the assets folder.
Note: Android only.
Write the contents to filepath. encoding can be one of utf8 (default), ascii, base64. options optionally takes an object specifying the file's properties, like mode etc.
Append the contents to filepath. encoding can be one of utf8 (default), ascii, base64.
Write the contents to filepath at the given random access position. When position is undefined or -1 the contents is appended to the end of the file. encoding can be one of utf8 (default), ascii, base64.
Moves the file located at filepath to destPath. This is more performant than reading and then re-writing the file data because the move is done natively and the data doesn't have to be copied or cross the bridge.
Copies the file located at filepath to destPath.
Note: On Android copyFile will overwrite destPath if it already exists. On iOS an error will be thrown if the file already exists.
Copies the file at filepath in the Android app's assets folder and copies it to the given destPath path.
Note: Android only. Will overwrite destPath if it already exists
copyAssetsFileIOS(imageUri: string, destPath: string, width: number, height: number, scale : number = 1.0, compression : number = 1.0, resizeMode : string = 'contain' ): Promise<string>
iOS-ony: copies a file from camera-roll, that is prefixed with "assets-library://asset/asset.JPG?..." to a specific destination. It will download the original from iCloud if necessary. If width and height is > 0, the image will be resized to a specific size and a specific compression rate. If scale is below 1, the image will be scaled according to the scale-factor (between 0.0 and 1.0) The resizeMode is also considered. Further information: https://developer.apple.com/reference/photos/phimagemanager/1616964-requestimageforasset The promise will on success return the final destination of the file, as it was defined in the destPath-parameter.
Unlinks the item at filepath. If the item does not exist, an error will be thrown.
Also recursively deletes directories (works like Linux rm -rf).
Check if the item exists at filepath. If the item does not exist, return false.
Check in the Android assets folder if the item exists. filepath is the relative path from the root of the assets folder. If the item does not exist, return false.
Reads the file at path and returns its checksum as determined by algorithm, which can be one of md5, sha1, sha224, sha256, sha384, sha512.
Sets the modification timestamp mtime and creation timestamp ctime of the file at filepath. Setting ctime is only supported on iOS, android always sets both timestamps to mtime.
type MkdirOptions = {
NSURLIsExcludedFromBackupKey?: boolean; // iOS only
};
Create a directory at filepath. Automatically creates parents and does not throw if already exists (works like Linux mkdir -p).
(IOS only): The NSURLIsExcludedFromBackupKey property can be provided to set this attribute on iOS platforms. Apple will reject apps for storing offline cache data that does not have this attribute.
type DownloadFileOptions = {
fromUrl: string; // URL to download file from
toFile: string; // Local filesystem path to save the file to
headers?: Headers; // An object of headers to be passed to the server
background?: boolean;
progressDivider?: number;
begin?: (res: DownloadBeginCallbackResult) => void;
progress?: (res: DownloadProgressCallbackResult) => void;
connectionTimeout?: number // only supported on Android yet
readTimeout?: number // only supported on Android yet
};
type DownloadResult = {
jobId: number; // The download job ID, required if one wishes to cancel the download. See `stopDownload`.
statusCode: number; // The HTTP status code
bytesWritten: number; // The number of bytes written to the file
};
Download file from options.fromUrl to options.toFile. Will overwrite any previously existing file.
If options.begin is provided, it will be invoked once upon download starting when headers have been received and passed a single argument with the following properties:
type DownloadBeginCallbackResult = {
jobId: number; // The download job ID, required if one wishes to cancel the download. See `stopDownload`.
statusCode: number; // The HTTP status code
contentLength: number; // The total size in bytes of the download resource
headers: Headers; // The HTTP response headers from the server
};
If options.progress is provided, it will be invoked continuously and passed a single argument with the following properties:
type DownloadProgressCallbackResult = {
jobId: number; // The download job ID, required if one wishes to cancel the download. See `stopDownload`.
contentLength: number; // The total size in bytes of the download resource
bytesWritten: number; // The number of bytes written to the file so far
};
If options.progressDivider is provided, it will return progress events that divided by progressDivider.
For example, if progressDivider = 10, you will receive only ten callbacks for this values of progress: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
Use it for performance issues.
If progressDivider = 0, you will receive all progressCallback calls, default value is 0.
(IOS only): options.background (Boolean) - Whether to continue downloads when the app is not focused (default: false)
This option is currently only available for iOS, and you must enable
background fetch
for your project in XCode. You only need to enable background fetch in Info.plist and set
the fetch interval in didFinishLaunchingWithOptions. The performFetchWithCompletionHandler
callback is handled by RNFS.
Abort the current download job with this ID. The partial file will remain on the filesystem.
(iOS only) uploadFiles(options: UploadFileOptions): { jobId: number, promise: Promise<UploadResult> }
options (Object) - An object containing named parameters
type UploadFileOptions = {
toUrl: string; // URL to upload file to
files: UploadFileItem[]; // An array of objects with the file information to be uploaded.
headers?: Headers; // An object of headers to be passed to the server
fields?: Fields; // An object of fields to be passed to the server
method?: string; // Default is 'POST', supports 'POST' and 'PUT'
begin?: (res: UploadBeginCallbackResult) => void;
progress?: (res: UploadProgressCallbackResult) => void;
};
type UploadResult = {
jobId: number; // The upload job ID, required if one wishes to cancel the upload. See `stopUpload`.
statusCode: number; // The HTTP status code
headers: Headers; // The HTTP response headers from the server
body: string; // The HTTP response body
};
Each file should have the following structure:
type UploadFileItem = {
name: string; // Name of the file, if not defined then filename is used
filename: string; // Name of file
filepath: string; // Path to file
filetype: string; // The mimetype of the file to be uploaded, if not defined it will get mimetype from `filepath` extension
};
If options.begin is provided, it will be invoked once upon upload has begun:
type UploadBeginCallbackResult = {
jobId: number; // The upload job ID, required if one wishes to cancel the upload. See `stopUpload`.
};
If options.progress is provided, it will be invoked continuously and passed a single object with the following properties:
type UploadProgressCallbackResult = {
jobId: number; // The upload job ID, required if one wishes to cancel the upload. See `stopUpload`.
totalBytesExpectedToSend: number; // The total number of bytes that will be sent to the server
totalBytesSent: number; // The number of bytes sent to the server
};
Percentage can be computed easily by dividing totalBytesSent by totalBytesExpectedToSend.
Abort the current upload job with this ID.
Returns an object with the following properties:
type FSInfoResult = {
totalSpace: number; // The total amount of storage space on the device (in bytes).
freeSpace: number; // The amount of available storage space on the device (in bytes).
};
groupIdentifier (string) Any value from the com.apple.security.application-groups entitlements list.
Returns the absolute path to the directory shared for all applications with the same security group identifier. This directory can be used to to share files between application of the same developer.
Invalid group identifier will cause a rejection.
For more information read the Adding an App to an App Group section.
Test app to demostrate the use of the module. Useful for testing and developing the module: